SAFETY PRECAUTIONS FOR MAINTENANCE WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY DEVICES FOR WORK EQUIPMENT Always lower all movable work equipment to the ground or to their lowest position before performing service repairs under the machine. Never work under the machine if the machine is poorly supported. Place the work equipment control levers at NEUTRAL, and set safety lock lever (1) to the LOCK position. A0055140 Lock Free AB30576C PROPER TOOLS Use only tools suited to the task. Using damaged, low quality, faulty, or makeshift tools could cause personal injury. Broken pieces of chisels or hammers could fly into your eyes and blind you.
Tools “STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS” on page 188. A0055120 PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS Hoses and other parts of the fuel, hydraulic, and brake system are critical parts for ensuring safety, so they must be replaced period- ically. Replacement of safety critical parts requires skill, so please ask your Komatsu distributor to carry out replacement. Replace these components periodically with new ones, regardless of whether or not they appear to be defective. These components deteriorate over time, and can cause fire because of oil leakage or failure in the work equipment sys- tem.
Replace or repair any such components if any defect is found, even though they have not reached the time specified. Replacement of safety critical parts see “PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS” on page 43. 43